Tornado Watch 307

Issued

May 11, 2008, 2:07 PM EDT (18:07 UTC)

Expired

May 11, 2008, 8:00 PM EDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

70 kt

The Raleigh/Durham radar (KRAX), 76 km from the middle of the area, began a volume at 18:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 890May 11, 1:39 PM EDT
• Mesoscale Discussion 894May 11, 4:18 PM EDT

000
WWUS20 KWNS 111810
SEL7  
SPC WW 111810
NCZ000-SCZ000-VAZ000-120000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 307
NWS STORM PREDICTION CENTER NORMAN OK
210 PM EDT SUN MAY 11 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTH CAROLINA
       NORTHERN SOUTH CAROLINA
       SOUTHERN VIRGINIA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800
PM EDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF
SOUTH HILL VIRGINIA TO 75 MILES SOUTH SOUTHEAST OF CHARLOTTE
NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 306...

DISCUSSION...STRONGLY FORCED PRE-FRONTAL SQUALL LINE HAS PASSED THE
CREST OF THE APPALACHIANS AND WAS RECONSOLIDATING ACROSS THE VA/NC
FOOTHILLS ATTM. AIR MASS AHEAD OF THE BROKEN CONVECTIVE LINE WAS
ONLY WEAKLY UNSTABLE BASED ON OBJECTIVE DATA. HOWEVER...BINOVC AND
MOISTENING ON LOW LEVEL ESELY FLOW WILL CONTRIBUTE TO CONTINUING
DESTABILIZATION AS THE INTENSE FORCING WITH THE UPPER TROUGH AND
100KT 500MB WIND MAX SPREAD EAST. IN ADDITION TO RAPID STORM MOTION
AND WIND DAMAGE THREAT...BRIEF TORNADOES APPEAR POSSIBLE AS STRONG
SECONDARY CYCLOGENESIS COMMENCES ALONG THE PIEDMONT FRONT...AND INTO
SERN VA NEXT FEW HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 24035.


...CARBIN

Tornado Watches in North Carolina, 2008Tornado Watches in Virginia, 2008Tornado Watches in South Carolina, 2008Every tornado watch in 2008

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.